Antenna



FIG. 1 is a front elevation view of an antenna;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a top perspective view thereof.

The dot-dash broken lines, and the broken lines immediately adjacent to the surfaces of the claim in the top and bottom views, indicate the bounds of the claim. All other broken lines are directed to environment. The broken lines form no part of the claimed invention. 

CLAIM The ornamental design for an antenna, as shown and described. 